bunting



W. H. BUNTING.

MEANS FOR FORMING BEARING SURFACES.

APPLICATION FILED JAN.12. 19H- latenlcd Hut. 1-. 19.

2 SHEETSSH INVEN my v d W. H. BUNUNG. MEANS FOR FORMING BEARING SURFACES! APPLICATION man JAN. 12. 1917.

1. filflmfi'yu Patented Oct. 14, 1919.

2 SHEETS-SHEET 2.

"'"------My-invention relates to UNITED STATES PATENT oFrioE.

WILLIAM H. BUNTIN G, OF TOLEDO, OHIO, ASSIGNOR TO THE HUNTING BRASS 86 BRONZE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO. I

NEWS FOR FORMING BEARING-SURFACES.

Specification of Letters Patent.

a ucauonmea January 12,1911. Serial at. 142,002.

. and useful M eans for-=Forming"Bearing sur aces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable othersvskilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference, marked thereon, which form a part of this specification.

means for formin bearings having compacted surfaces The object of the invention is to pnfide a means which i'vill form from the r ugh 0 casting of the bearing .a cylindrical surface which will have an axis coincident with the axis of the exterior surface of the bearing and subsequently compacting the surface of the hearin vthus prepared, which, results may be readily produced in the single movement of the said means.

The invention may-be contained-in different forms of constructions for different purposes,all of which come within the urview of my claims hereinafter appended To show the practicability of my invention I have selected one of such constructions as an example and shall describe it hereinafter. The construction selected is illustrated in the accompanying drawing.

Figure 1 of the drawing is ,a side view of a device containing my invention. Fig. 2 illustrates a transverse sectional view of the device showing cutting lips for operating 'on the bearing preparatory to finishing the surface in advance of the compacting operation. Fig. 3 is an end viewof the device. Fig. 4 is a side view of the device showing sectionally the shelf ortable of a press arid a plunger for operatin the device. Fig. 5 illustrates a stripper lock used to hold the bearing. Fig. 6 is a sectional view of a modified form of bearing surface forming on is placed on a shelf or tablebearing with respect to the lunger 3, which operates upon the means 2 or surfacing the bearing and compacti the surface. If the means operates on t e bearings in the return stroke of the lunger as well as the ""forwardstrolge, a stripper block 32 is provided. The block" 32 1s bolted byhtheubolts 33 to the shelf 1. It is substantially semicylindrical in form and is provided with two inwardly extending flanges 34 and 35. The flange 34 operates to center the bushing or hearing 6 Wlth respect to the plunger 3 when thebeanin is slipped into the strip ping block 32. he'inner edge of the lower endeof., the bearing preferably extends over A the edge 6f'"the* =opening,4 fogrned in the shelf 1. upper end of the bearing (S'to engage and hold the bearing while the plunger 3 is making its return stroke. The means for surfacin the bearin and compacting the surface t us passes 51 Patented Oct.14,1919.

The flange 35 extends 25m the---- rough the bearing 6 and the opening 4 in its-strokes back and forth.

If'it is desired to return the means for compacting the bearing surface through'tlie bearing, the plunger 3 is provided with an extension 36 which passes through the compacting means 2 and issecured thereto by the nut 37. The stripping block 32 may be used when the meansfor pgeparing the surface of the bearing and foripompacting the surface thereof is moved relative to the table -1. On the other hand, if desired, the means for compactin the surface may be fixed relative to the ta 1e 1 and the bearing moved over the means forcompacting the surface of the hearing.

The means shown in the drawingis' for forming and compacting the inner surface of the bearing. It is made of a single cylin-' drical member which may be moved relative to the bearing. Itmay be fixed with respect tothe shelfor press and the bearing moved over the cylindrical member, or the bearing may be fixed relative to the shelf or press, and the bearing moved over the member.

The means 2 for forming the bearing surface is provided withpreferablya orru- .gated or fluted pilot 20 having preferably cuts or flutes 21. The number of such flutes will, of course, va iiy according to the size of. the bearing. he flutes '01 cuts formed in the pilot 1 may be varied in size likewise according to the diameter of the i 7 ing so that the axis of the member will be 7 ing.

bearing and according to the condition of the castings and according to the alloy of which the bearingis composed. The object of the flutes or cuts i to enable the operator to place the bearing relative to the member or the member relative to the bearcoincident with the az zis of the bearing, and to prevent a slight displacement of the bearmg, 01 member relative to the hearing by reason of any roughness of surface that may be found near the upper edge of the hear The hearing may be so placed that the flutes or cuts will spread at least a portion of the irregularities.

Above the fluted pilot are located aplurality of cutting members or ridges. One

or more of the ridges are fluted or channeled 1 forming the bearing surface will produce each other.

substantially a complete circle. however, may be so formed that the projections will be disposed a short distance from In such case when the means for forming the bearing surface is moved relative to the bearing, a slight amount of metal in the form of ridges or parts of ridges will be formed after the ridges having the cutting lips have passed any particular point of the hearing, which ridges, 'or portions thereof, will-have surfaces in the line of movement of the ends of the lips. The lips of each ridge thus operate to cut portions of the irregularities on the surface of the bearing, while at the same time permitting the fluted pilot to keep the means for forming the bearing surface substantially in alinement with the axis of the bearing, which could not be doneso well if the cutting edge of the ridges were continuous. The lips also operate to cut portions of the.

' be substantially uniform throughout the travel of the bearing relative to the means for forming the bearing surface, that is, the cutting lips being divided over a plurality of cutting ridges. the irregularities met with by the lipswill be correspondingly divided between the cutting ridges, which permits The lips,

p are the operation to be produced under a substantial] y uniform pressure to move the bearing and means relative to each other.

In the form of the invention shown in Fig. 1, the ridges 24 are provided with the cutting lips 25, the projections of which on a plane at right angles to the means for forming the bearing surface are slightly displaced from each other. In cutting, the formed channels separated by narrow ridges on the inner surface of the bearingextend lengthwise of the bearing. These ridges, however, are cut and removed from the interior of the hearing by thecufting edges located on members or ridges disposed behind the rid es 2-1. The projections of the ends of the lips 25 being displaced and so that the lips leave longitudinal ridges in the inner surface of the bearing, twisting of the bearing relative to the member is prevented as it gives to both ends of each lip substantially the same work to do, while if a complete cut was made by the ridges of the members having the lips one endof each lip of ridges other than the first would have to out along a lateral surface, which would not be required of the opposite end of thclip.

In the form of construction shown a plurality of ridges 26' are located on the cylin drical member '2 behind the ridges 24 and provided with the cutting edges 28. Following the ridges26 is a member 30 having a square cutting edge 29 backed by a relatively broad cylindrical surface, which operates to give a polishing shave oil the bearing-and as a burnisher and a pilot. It secures the bearing and the member 2 in position relative to each other during the compacting operation.

Behind theg'pilot 30 are located members having compacting surfaces or beaded surfaces which operate to compact the surface of the bearing to form 'a compacted skin Within the hearing In the form of the invention shown the beads 31 are formed on the member 2, and as the member 2 and the bearin are moved one with respect to the other t 1e compactin beads operate successively .upon the sur ace of the-bearing which has been prepared the cutting ridges 24 and 26 and the pilot 30. They successively compress the surface and form a compactedskin which decreases in its-com pactness and hardness from the surface of the bearing toward the interior of the metal of which the bearing is formed A pilot 40 follows tlle bcads 31 and finishes the compacting operation. It is thesamc size as the last of the beads 31, or a trifle larger in diameter. It also forms a guide for the heads, when the member 2 is connected with means for causing its return through the hearing. The strolie of the plunger 3v is preferably such as to force the member 2 through the bushing to a point that the lower edge of the bushing will extend over the upper edge of the ilot 40. Upon the return stroke the bushing will be operated upon by the'iiat surface 40 and 5'; by the beads, and the member 2 will be guided by the pilot 40.

The diameters of the several parts of the bearing surface cutting and compacting means increase byvery small fractions of an inch from the pilot. The circles of the edges of the lips of the ridges 24 are substantially the same and slightly larger in diameter than the pilot 20. The lower ridge 26 may be substantially the same as 5 that of the circle of the edges of the lips 25,

; than the first ridge 26. The pilot 30 having the. square edge 29 is also very slightly larger in diameter than the uppermost ridge 26.' The compacting beads preferably increase silghtly in diameter over the drameter of the pilot 30, while the pilot 40 is substantially-the same as, or a trifle larger in diameter, than the last or uppermost compactin head 31 of the member 2.

In tie form of the invention illustrated J; in Fig. 6, the rejections of the lips 41 on bearings, the combination of a fluted pilot a plane locate at right angles to the axis of the means for compacting the surface of bearings overlap so that each succeeding ridge will make a clean cut in the bearing and not leave any longitudinal ridges or portions thereof within the bearings The following ridge 26 may then be made slightly larger in diameter than the circle of the edges of the lips lla-of the ridges 2%.

I claim: 1. In a means, for forming surfaces of followed by a plurality of coaxial cutting ridges having successively increased diameters.

2. In a means for forming surfaces of bearings, the combination of a fluted pilot followed by a plurality of coaxial cutting ridges, a following pilot having a broad burnishing surface, a square cutting edge,

and a plurality of beads having succesively increased diameters. f

3. In a means for forming surfaces of bearings, the combination of a fluted pilot followed by a plurality of coaxial cutting ridges having successively increased diametors, a following pilot having a broad burbeads having successively increased diameters located intermediate the two last named pilots.

5. In a means for forming surfaces of bearings, a pair of pilots, coaxial compacting beads having successively increased diameters located intermediate and contiguous to the pilots.

6. In a means for forming surfaces of bearings, a pilot, a plurality of coaxial cutt ng ridges having cutting lips for successively cutting portions of the surface of the bearing, a ridge having a complete circular cutting lip and a member having a square cutting edge and a burnishing surface.

7. In a means for forming surfaces of bearings, a pilot, a plurality of coaxial cutting ridges having short cutting lips for successively cutting portlons of the surface .of the bearing, and ridges having complete circular cutting lips having diameters slightly increased over diameters of the circles of the cutting edges of the lips.

8. In a means for forming surfaces of bearings, a pilot, a plurality of coaxial cutting ridges having short cutting lips for successively cutting ortions of the cylindrical surface of the caring, cutting ridges having diameters slightly increased over diameters of the circles of the cutting edges of the lips, and a pilot following the last named cutting ridges.

. 9. In a meansfor forming surfaces of bearings, a pilot, a plurality of coaxial cutting ridges having short cuttin lips for successively cutting portions of t e surface .of the bearing, a complete circular. cutting ridge having a diameter slightly increased over diameters ofthe circles of the cutting edges of the'lips, and a member having a square cutting edge and a broad burnishmg surface following the last named ridges.

10. In a means for forming surfaces of bearings, a pilot, a plurality of coaxial cutting ridges having cutting lips for successively cutting portions of the surface of the bearing, cutting ridges having diameters slightly increased over diameters of the circles of the cutting edges of, the lips, a'

member having a square cutting edge and a broad burnishing surface following the last named ridges, a second pilot, and beads having diameters successively increasedlocated between the burnishing member and the last named pilot. v

11. In a means for forming surfaces of bearings, the combination of a pilot,'r1dges of which on a plane at-right angles to the axis of the ridges being disposed in spaced having coaxial cutting lips, the projections ting ridges, the channels of each ridge being staggered relative to the channels of the other ridges, the diameters of the cutting edges of the ridges being the same, a circular cutting edge having a diameter slightly increased over that of the fluted ridges.

14. In a means for forming surfaces of bearings, a lurality of coaxial fluted cutting ridges, tie channels of each ridge being staggered with respect to the channels of the other ridges, a complete circular cutting ridge located above the fluted ridges.

. lindrical sur aces of the bearings, a plurality of coam'al cutting.

15. In a means for forming surfaces of bearings, a plurality of coaxial cutting lips for succesrtions of the cyearings, complete circular cutting ridges having diameters ridges having short cutting sively cuttin contiguous slightly increased over the diameters of thecircles of the cutting lips.

16. In a means for forming surfaces of bearings, a plurality of coaxial cutting ridges. having short cutting lips. for successively cutting contiguous ortions of the cylindrical-surfaces of the earings, complete circular cutting ridges having diameters slightlyincreased over the diameters of the .circles of the cutting edges of the lips, pilots preceding and following the cutting ridges.

17. In a means for formingsurfaces of ridges having short cutting lips for success sively cutting contiguous portions of the cylindrical surfaces of the. bearings, complete circular cutting ridges hay ng diameters slightly increased over the diameters oflthe 1 ots and following the cutting r1dg es, the pilot following the cutting ridges having circles of the cutting edges of the lips, p preceding a square cutting edge. 18. In a means for bearings, a plurality ridges having short cutting lips for successively cutting contiguous portions of the cylindrical surfaces of the bearings, complete circular cutting ridges having diameters forming surfaces of of coaxial cutting bearings,

staggered relation.

channels extending parallel to the axis of the broach,-the chan- 110 slightly increased over the diameters of the circles of the cutting-edges of the lips, pilots preceding and following the cutting ridges, compacting beads following the pilot followmg the cutting ridges.

19. In a means for forming surfaces for hearings, a fluted pilot followed by a phiralit-y of coaxial fluted cutting; ridges, thechannels of each ridge being staggered relative to the channels of the other ridges.

'20. In a meansfor forming surfaces for bearings, the combination of a fluted pilot followed by. a plurality of coaxial cutting ridges, a following pilot having, a broad burnishing surface and a continuous cutting edge, anda plurality of beads having a successively increased diameter.

2-1. In a means for forming surfaces for bearings, a fluted pilot, a plurality of co axial cutting ridges having cutting edges for successively cutting portions of t 1e surface of the bearings, a member having 2. continu 39 ous cutting edge'and a burnishmg surface.

22. In a means for forming surfaces for bearings, the combination of a plurality of coaxial cutting ridges for-successively cutting portions f the surfacefof the bearing, a member having a continuous square 0 ttnig edge and a broad burnishing surface fo lowing the cutting-ridges.

23. In a means for forming surfaces for a pluralityof coaiial fluted cut 9( tin-g edges located in spaced relation to each other, the channels of theleading ridges be ing in line with the cutting edges of the following ridges.

24$. Ina means for"'forniing surfacesforeg bearings having a plurality-ofridges having coaxial cutting edgesebne'ofithe leading cutting ridgesbeing fluted-and thechannels of the leading ridge being in line with the cutting edge of a fOIlOWiQgI'IdgG. I

25.- In a broach, the 'comh'nation of a pluraliti of ridges having outing edges and channels extending across thefirid'gesj an? 4 parallel to the axis of the"broach',-1-the cha'n w nTals in'consecutive ridges being'located in 1 5 26. In a hroach, the combination of a plurality of ridges havingcuttlng edges and across the ridges; and

nels in consecutive rid s being located in staggered relation, an a following ridge having an unbroken-edge. I

In testimony whereof I have hereunto signed my name to this specification.

' WILLIAM H. HUNTING. 

